From what I know the Ultimate arcades are good, but overpriced.
You can probably get a used cabinet in decent shape from about $100 - $500.
Overpriced!?
The kits are one of the cheapest (if not THE cheapest) available and it's a great cabinet! If you're talking about built ones on ebay or auctions, I agree. They can be expensive, but don't forget, they usually come with a 27in montior (something like a d9200) which is pricey on its own, along with hundreds in controls, etc (by the time you count coin door, 4 joysticks, trackball, spinner, interfaces, computer, you're already looking at $700-$1000 just in parts alone OR MORE, nevermind labor.)
--NipsMG